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Top Consulting Firms in Belfast (39)

Nisos
Artificial Intelligence • Security • Business Intelligence • Consulting • Cybersecurity
2 Offices
70 Employees
109 Benefits Hiring Now
Unmask adversaries. Protect against human risk and digital threats.

Nisos is a human risk intelligence and managed investigations company that protects organizations and their people from human-driven and digital threats by operating as an extension of their security, intelligence, and legal teams. It leverages a team of expert analysts, specialized in open-source intelligence and adversary tradecraft, to provide actionable intelligence that addresses complex risks like executive threats, insider fraud,...

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Nisos

Nisos's Top Stability & Growth Strengths

Strong Revenue Growth: Company-reported metrics indicate monthly revenue doubled over 24 months and subscription revenue increased fourfold within 12 months. Net revenue retention reached 100% in 2023, signaling expansion of recurring relationships.

Investor Backing & Capital Strength: The business secured a $14M Series C in July 2025, bringing total disclosed funding to roughly $41.7M across five rounds. Independent industry tracking in 2025 also records the round, indicating continued access to institutional capital.

Product Line Growth: The 2025 launch of the Ascend human‑risk platform and subsequent modules reflect expansion beyond managed‑intelligence services into a broader platform offering. Current positioning spans executive protection, insider‑threat intelligence, employment‑fraud detection, third‑party intelligence, and digital exposure monitoring.

Catagen
Greentech • Consulting
2 Offices
54 Employees

CATAGEN’s mission is to clean and decarbonise the air. We are a pioneering green emissions testing facility based in Belfast providing unrivalled metrics to optimise catalyst development and reduce harmful tailpipe emissions. Our expertise in the mobility sector and global emissions standards has led us to develop ClimaHtech technologies including Green Hydrogen. Our Core Business provides GREEN emissions testing to global...

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Catagen
CI&T
Information Technology • Consulting
22 Offices
6,474 Employees
28 Benefits

CI&T is your end-to-end digital transformation partner. As a digital native, we bring a 27-year track record of accelerating business impact through complete and scalable digital solutions. With a global presence of 6,000+ professionals in strategy, research, data science, design and engineering, we unlock top-line growth, improve customer experience and drive operational efficiency.

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CI&T
Phastar
Biotech • Consulting
3 Offices
399 Employees

Phastar is a specialist biometrics contract research organization offering statistical consulting, clinical trial reporting, data management and data science services by providing expert consultants and managing and delivering in-house projects, FSP-style arrangements and preferred partnerships. Our number one priority is ensuring on time, quality work: every project undertaken is supervised on methodology and utilizes internal processes designed to guarantee optimal...

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Phastar
QBE LLC
Information Technology • Professional Services • Consulting • Defense
50 Offices
66 Employees

QBE LLC is a management and technology consulting organization that provides services to the federal government and defense communities, offering IT services, cybersecurity, cloud infrastructure, data management, and system engineering.

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QBE LLC
Marsh McLennan
Fintech • HR Tech • Insurance • Consulting
35 Offices
78,000 Employees
37 Benefits Hiring Now

Marsh McLennan (NYSE: MMC) brings together nearly 78,000 experts in risk, strategy, and people across Marsh, Guy Carpenter, Mercer, and Oliver Wyman, serving clients in over 130 countries. Marsh enables enterprise worldwide by helping clients manage risks, transforming uncertainty into opportunity. Guy Carpenter helps clients grow profitably with reinsurance broking expertise, advisory services, and advanced analytics. Mercer helps organizations advance...

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Marsh McLennan

Marsh McLennan's Top Stability & Growth Strengths

Strong Revenue Growth: Revenue expanded across 2024–2025, including double-digit reported growth in 2025 alongside continued underlying growth, with quarterly updates showing consistent momentum.

Diversified Revenue Streams: The business mix spans insurance broking, reinsurance, human capital, and strategy consulting, which helps smooth performance across insurance pricing cycles and broader macro conditions.

Healthy Cash Flow: Cash generation strengthened versus the prior year alongside margin progress, and the company returned significant capital through share repurchases, indicating strong cash conversion and financial flexibility.

Cooper Parry
Professional Services • Consulting • Financial Services
12 Offices
1,200 Employees
Hiring Now

Cooper Parry is a UK accountancy and business-advisory firm serving entrepreneurial businesses, founders, dynamic companies, and high-net-worth individuals across the UK and overseas. Its services span audit, tax, innovation, technology and high-growth support, outsourced finance, corporate finance, deals, wealth management, sustainability advisory, legal, and digital solutions. The firm combines big-firm capability with boutique energy and people-first delivery for the mid-market.

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Cooper Parry
WTW
Fintech • Insurance • Database • Consulting
43 Offices
48,795 Employees
37 Benefits

At WTW (NASDAQ: WTW), we provide data-driven, insight-led solutions in the areas of people, risk and capital. Leveraging the global view and local expertise of our colleagues serving 140 countries and markets, we help you sharpen your strategy, enhance organizational resilience, motivate your workforce and maximize performance.

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WTW

WTW's Top Stability & Growth Strengths

Strong Market Position & Advantage: The company is consistently characterized as a top-tier global broker and advisory leader across insurance brokerage, risk consulting, and HR/benefits, operating at significant global scale. Leadership in insurance consulting and technology further reinforces a durable competitive position.

Strong Revenue Growth: Organic revenue has been steadily expanding across core segments, with recent quarters showing year-over-year top-line increases. Management continues to signal mid-single-digit organic growth ahead, indicating ongoing demand in the underlying business.

Cost & Operational Efficiency: Margin expansion is supported by productivity initiatives, disciplined cost controls, and AI-driven programs aimed at streamlining operations. These efforts have coincided with stronger profitability metrics and an emphasis on operational excellence.

PwC Greece
Artificial Intelligence • Professional Services • Business Intelligence • Consulting • Cybersecurity • Generative AI
80 Offices
2,108 Employees
2 Benefits

At PwC our purpose is to build trust in society and solve important problems. We’re a network of firms in 155 countries with over 327,000 people who are committed to delivering quality in assurance, advisory and tax services. Find out more and tell us what matters to you by visiting us at www.pwc.com.

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PwC Greece
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Public Consulting Group
52 Offices
3,689 Employees
23 Benefits

Public Consulting Group, Inc. (PCG) is a leading public sector solutions implementation and operations improvement firm that partners with health, education, and human services agencies to improve lives. Founded in 1986 and headquartered in Boston, Massachusetts, PCG has over 2,500 professionals in more than 60 offices worldwide—all committed to delivering solutions that change lives for the better. The firm has...

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Public Consulting Group

Public Consulting Group's Top Stability & Growth Strengths

Strong Market Position & Advantage: PCG is depicted as a leader in K-12 special education platforms (EDPlan in 30+ states) and as the nation’s largest provider of school-based Medicaid services supporting 4,000+ districts. Recent statewide and district awards and the GSA schedule extension to 2030 reinforce incumbency and access to government buyers.

Market Expansion: New 2025 wins (e.g., Michigan DHHS behavioral health training center, Frederick County MD EDPlan) and statewide vehicles (e.g., Virginia Evoke deployment, renewed GSA MAS) indicate ongoing footprint expansion. PPL’s New York single-FI award and operational build-out further signal scale-up within PCG’s family of companies.

Product Line Growth: Platform traction spans EDPlan for education and Evoke for regulatory/licensing workflows with live deployments and statewide pathways. The Emerald Education asset acquisition adds STEM/CTE and math resources, broadening the education solutions portfolio.

Ernst & Young
Professional Services • Consulting
32 Offices
350,000 Employees
44 Benefits

EY exists to build a better working world, helping create long-term value for clients, people and society and build trust in the capital markets. Enabled by data and technology, diverse EY teams in over 150 countries provide trust through assurance and help clients grow, transform and operate. Working across assurance, consulting, law, strategy, tax and transactions, EY teams ask better questions to...

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Ernst & Young
AAB
Professional Services • Consulting • Financial Services

AAB delivers Audit, Accounting, Tax, Payroll, HR, Consulting, and Advisory Solutions globally from its offices in the United Kingdom and Ireland.

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AAB
SITA
Information Technology • Consulting
21 Offices
7,798 Employees
33 Benefits

Travel fuels the world today. Connecting us all. Building a better quality of life, and propelling our global economy. Since the start, we’ve made it our lifework to build solutions that help every airline and every airport across the world. We made check-in easier. We let pilots talk to ground control. We delivered better ways to track down lost...

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SITA

SITA's Top Stability & Growth Strengths

Strong Market Position & Advantage: Global reach is positioned as a core strength, including a communications backbone with worldwide coverage and very high availability, plus entrenched platforms like WorldTracer in baggage operations. Segment leadership is described as clearest in air‑transport communications infrastructure, baggage irregularity management, and common‑use/passenger processing where deployments are widespread.

Strong Revenue Growth: Revenue is described as rising for two consecutive years, reaching record results through 2023 and 2024 with growth across major business lines and geographies. Momentum is framed as broad-based rather than limited to a single segment.

Innovation-Driven Growth: Investment in R&D and a stated focus on product innovation are highlighted as contributors to recent momentum. Acquisitions such as Materna IPS and ASISTIM are portrayed as capability additions that expand the end‑to‑end passenger and operations portfolio.

Obbi Golf
Information Technology • Consulting
Belfast
50 Employees

A turn-key integrated Golf Club management platform for Compliance, Safety and Training bespoke to your Club. Obbi Golf comes ready loaded with best-practice content including policies and procedures, risk assessments, safe operating procedures, training materials, accident reports and much more

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Obbi Golf
Reply
Information Technology • Consulting
35 Offices
4,171 Employees
11 Benefits

Reply [EXM, STAR: REY] specialises in the design and implementation of solutions based on new communication channels and digital media. As a network of highly specialised companies, Reply defines and develops business models enabled by the new models of AI, big data, cloud computing, digital media and the internet of things. Reply delivers consulting, system integration and digital services to...

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Reply
Visiativ
Information Technology • Professional Services • Software • Consulting
27 Offices
1,600 Employees
Hiring Now

Visiativ is a French technology and consulting group that helps businesses—particularly small and mid-sized companies—plan, implement, manage and monitor digital transformation and innovation. It delivers digital solutions and services spanning 3D CAD/product development, product lifecycle management, business-process automation and enterprise systems, while providing assessment, implementation, training and ongoing support to improve competitiveness, productivity, collaboration and business performance worldwide.

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Visiativ
Wavteq
Marketing Tech • Consulting
5 Offices
36 Employees

Wavteq Group Limited is a global lead generation and digital marketing company providing results-driven trade and investment services to economic development organizations. In 2023, Wavteq completed the successful sale of its products and consulting assets to the Financial Times Group Limited enabling the company to focus on global expansion of its core trade and investment services. Since 2022, Wavteq has...

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Wavteq
AECOM
Consulting
36 Offices
51,000 Employees
39 Benefits Hiring Now
We are the trusted global infrastructure leader.

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design...

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AECOM

AECOM's Top Stability & Growth Strengths

Profitability: Feedback suggests profitability is strengthening with record margins and double‑digit EPS growth alongside guidance raises as of Q2 FY2026. Independent coverage also characterized the print as “record‑breaking performance,” reinforcing earnings momentum.

Resilient & Sustainable Growth: Feedback suggests underlying growth is durable, evidenced by a record and rising backlog with management raising full‑year guidance. Calendar and award‑timing headwinds are already embedded in outlook, indicating resilience despite near‑term noise.

Strong Market Position & Advantage: Feedback suggests AECOM’s consistent top industry rankings and global scale reinforce a competitive edge that supports demand capture. Recognition as the world’s top design firm in multiple sectors underpins its ability to win and retain large programs.

fscom (fscom.co)
Consulting • Financial Services
3 Offices
57 Employees

fscom is one of the premier specialist consulting firms providing governance, risk, and compliance solutions to financial services institutions in the UK and Ireland. Specialising in payments and e-money, crypto, asset and fund management and trading and broking, our deep domain experts have harvested unique regulatory insight, enabling them to translate complex regulations into meaningful, practical steps. As a result,...

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fscom (fscom.co)
ByrneLooby
Professional Services • Consulting • Design
10 Offices
224 Employees

ByrneLooby is an international consulting engineering practice providing civil engineering design and advisory solutions for challenging infrastructure projects. Headquartered in Dublin, the firm works across building, environment, transport, port, waste management, water and energy sectors. Its services support large-scale projects and infrastructure development for clients across Europe, Ireland, the UK and the Middle East, combining engineering expertise with practical, value-focused...

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ByrneLooby

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